# .. becomes %2E%2E
$refname =~ s{\.\.}{%2E%2E}g;
+ # trailing dots and .lock are not allowed
+ # .$ becomes %2E and .lock becomes %2Elock
+ $refname =~ s{\.(?=$|lock$)}{%2E};
+
+ # the sequence @{ is used to access the reflog
+ # @{ becomes %40{
+ $refname =~ s{\@\{}{%40\{}g;
+
return $refname;
}